Midea MSC-24HRN1 User Manual

Service manual
34
13.3 Detailed malfunction analyse
Current protection
(LED indicates)
Check the indoor
air filter.
Does outdoor heat-
exchanger frosted?
No
It is normal under
that ambient temp.
Check the
dra inage
system of
out door unit.
Yes
Does ind oor heat-
exchanger frosted?
Yes
Check speed
of indoor
motor.
Yes
No
Doe s the outdoor
temp over 48 C?
o
Check the outdoor
condenser.
Does it occur in
C ool mode?
Check speed
of outdoor
motor.
Yes
Check the over-
curre n t protector of
compressor.
No
Replace the
ma in PCB board.
Re place the
compressor.
Recycle the
refrigerant
and recharge .
No
Doe s the ind oor
temp low than 10 C?
o
Yes
No
Check the solenoid
coil of reverse valve.
C heck the ove r-
c urre nt protector of
compressor.
Replace the
main PCB board.
Recycle the refrige-
rant and rech arge.
R eplace the re verse
valve.
Check the position
and wiring of temp
sensor (all of the m).
If wrong, the unit w ill
result in current
prote ction, not temp.
C heck the soft
starter mould.
Check the soft
starter mould.
Indoor/Outdoor Units Communication Protection
Is the L&N connections between
indoor and outdoor units correct?
Reconnect correctly.
Is the communication connection good?
Reconnect correctly.
Replace the outdor PCB, then run the mac hine.
Is the communication protection relie ved?
It means that the malfunction is
from indoor unit. Replace the indoor PCB.
Yes
No
No
Yes
Yes

Midea MSC-24HRN1 Specifications

General

Brand	Midea
Model	MSC-24HRN1
Category	Air Conditioner
Language	English